import { PdfFilter } from './types.js';
/**
 * Creates an ASCIIHex filter for encoding and decoding PDF stream data.
 * ASCIIHex encodes binary data as pairs of hexadecimal digits,
 * resulting in a 100% expansion compared to the original data.
 *
 * @returns A PdfFilter object with encode and decode methods.
 *
 * @example
 * ```typescript
 * const filter = asciiHex()
 * const encoded = filter.encode(binaryData)
 * const decoded = filter.decode(encoded)
 * ```
 */
export declare function asciiHex(): PdfFilter;